Currently, fakemachine has this in its Depends: line:

 Depends: busybox | busybox-static, ...

The busybox-static alternative is not needed, because current busybox-static
package already have Provides: busybox, so will statisfy first alternative.

However, we're making changes to busybox-static package (see #1147074)
which will make it incompatible with older versions, including your
usage in fakemachine package.

Please drop busybox-static alternative from dependecies to allow us to
proceed.  This is a trivial change.

Thanks,

/mjt